20877890 has 16 divisors (see below), whose sum is σ = 40996800. Its totient is φ = 7591920.

The previous prime is 20877889. The next prime is 20877907. The reversal of 20877890 is 9877802.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94790 + ... + 95009.

It is an arithmetic number, because the mean of its divisors is an integer number (2562300).

Almost surely, 2^20877890 is an apocalyptic number.

20877890 is a deficient number, since it is larger than the sum of its proper divisors (20118910).

20877890 is a wasteful number, since it uses less digits than its factorization.

20877890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189817.

The product of its (nonzero) digits is 56448, while the sum is 41.

The square root of 20877890 is about 4569.2329772074. The cubic root of 20877890 is about 275.3566282230.

The spelling of 20877890 in words is "twenty million, eight hundred seventy-seven thousand, eight hundred ninety".